Adapter attachment for indicator dials



Deb. 7, 1948. J. F. LIVELY 2,455,592

' ADAPTER ATTACHMENT FOR INDICATOR DIALS 7 ,9 1 [Li A? III/A: a

a\a\l Inventor 7 WWW fi/mgg Patented Dec. 7, 1948 s PATENTg-fiOFFICE2,455,592 a Animal-summaries mbloa'ron' DIAL-SJ ll H '...l

tam F. Lively, MountVerndfi Qhio V 9, magistra es, 545. 769 (teams. (01.172)?" This invention relates to a special adapterlinjthe form of anattachment which is; directly engageabl'e with-[the Work, thesamekbeingadapted to accommodate a substantially standardStar-rett dial testindicator. 5 l

In carrying out the structural and functional principles of theinvention I have evolved and produced a combination attachment and dialindicator which is characterized by compactness and convenience, isstrong, reliable, efflcient in use, expeditious in its action, willspeed up the work by locating numerous points on the work being actedon, will definitely inform the attendant when a.

point is accurately located instead of depending on make-shift mirrorsand other ways-and-means of ascertaining what should be reliable anddepend-able results.

More specifically, the adapter attachment is in the form of asubstantially U-shaped frame, one

arm thereof carrying the dial indicator and the e ing the indicator dialand adapter attachment, all constructed in accordance with theprinciples of the instant invention.

Figure 2 is a top plan view with certain of the parts, principally thedial casing, removed to expose the other parts, this for clearness ofillustration.

Figure 3 is an end elevation of the structural assemblage with theindicator dial and its attaching,

arm removed, the view being an observation of Figure 1 in a directionfrom left to right.

Referring now to thedrawings by distinguishing reference numerals, theconventional Starrett dial gauge or indicator is denoted by the numeral4 and includes the customary casing unit 5, actuating rod 6, the casingbeing mounted on a head I on the inner end of a grooved rod 8. In thisinstance, the actuating rod 6 is provided with a beveled button 9.

portion! 1,, an right a iigularly disposed limbs o arms I: and, 13, thelatterarm being relatively boreirrtermediate 1 its ends and "anoutstanding socket 14 in alignment therewith. The socket contains acoiled spring [5. It also serves to accommodate the adjacent end portionof the workcontacting finger or plunger rod l6. The rounded ducedshouldered portion 18, the portion I! being held in place by a set screwl9 and carrying a conical wedge 2|] engageable with the motiontransmitting button 9. The dial gauge or indicator 4 is positionedbetween the arms l2 and I3 and over the bight portion in proper coactingposition and is held in place by a set screw 2| carried by the arm 12and engaging the adjustable indicator The adapter attachment comprises asubstantially U-shaped frame unit In embodying a bight arm 8. l Withthis arrangement the contact; finger 1-6, that is, the part whichengages the work surface is mounted for spring-pressed action in theadapter frame arms and is parallel to the arm 8, the latter carrying theindicator 4 and positioning the same directly above the contact fingerl6 and at a point between the two frame arms [2 and I3. As theright-hand rounded end of the contact finger l6 comes into engagementwith the surface being acted upon, the motion is transmitted thereby tothe cone 20 and from the cone to the button! which reciprocates theactuator rod 6 and denotes the result on the dial face. i

This indicator attachment is an extremely useful device to denote withaccuracy a hole whereas the indicator is readable without using a mirrorsuch as is sometimes required when the indicator is in improperrelationship to the Work-contacting element. It is believed, however,that these factors are quite evident to persons skilled in the art towhich the invention relates.

It is thought that persons skilled in the art to which the inventionrelates will be able to obtain a clear understanding of the inventionafter considering the description in connection with the drawings.Therefore, a more lengthy description is regarded as unnecessary.

Minor changes in the shape, size and arrangement of details comingwithin the field of invention claimed may be resorted to in actualpractice, if desired.

I claim:

1. An adapter attachment fora dial test indicator comprising asubstantially U-shaped frame including a central bight portion and longand short arms connected thereto and extending laterally therefrom, theshort arm having an opening for passage of a coactin-g contact finger,the longer arm being provided with a bore and an aligned socket oppositeto and in alignment with said opening, a coilcd spring in said socket, awork engaging and contacting finger bridging the space between said armsand parallel to said bight portion and having one end sli-dable in saidsocket and 1 the other end slid-able in the opening of said short I arm.

2. An adapter attachment for a dial test indi-i-" cator comprising asubstantially U -s-hapedi trams embodying a bight portion and a pair ofcomplemental arm-s, said arms being substantially '3 parallel to oneanother, one arm havinga guide1. opening for accommodation and passageof a sliding contact finger, the remaining am being provided with aboreand alsock'et' aligned said bore, said socket extending outwardlybeyondthe arm and being in alignment'with. the" opening in saidfirst-named arm, a coiled spring located and for, coaction with theusual actuating rod pro-' vided onsaid indicator.

JOHN F. LIVELY.

v e REFERENCES CITED The following references are of record in the lifeof this patent:

' UNITED STATES PATENTS Number V I Name" Date 968,88 fi" Reisnejr' etal; Aug. 30, I910 I',6U0;089j vBll'ShL Sept. 14, 1926 1595845; 4Carpenter e Dec'. 18, 1928

